From 0bddda5a11665c210339de76d27ebbd1a2e0b43c Mon Sep 17 00:00:00 2001 From: Haoxiang Li Date: Tue, 23 Jun 2026 17:33:25 +0800 Subject: [PATCH] usb: mtu3: unmap request DMA on queue failure mtu3_gadget_queue() maps the request before checking whether the QMU GPD ring can accept another transfer. the request is returned with -EAGAIN before it is linked on the endpoint request list if mtu3_prepare_transfer() fails. Normal completion and dequeue paths unmap requests from mtu3_req_complete(), but this error path never reaches that helper, so the DMA mapping is left active. Unmap the request before returning from the failed queue path. Fixes: df2069acb005 ("usb: Add MediaTek USB3 DRD driver") Cc: stable Signed-off-by: Haoxiang Li Link: https://patch.msgid.link/20260623093325.2105323-1-haoxiang_li2024@163.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_gadget.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c index da29f467943f..f224f2ee379a 100644 --- a/drivers/usb/mtu3/mtu3_gadget.c +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -305,6 +305,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep, if (mtu3_prepare_transfer(mep)) { ret = -EAGAIN; + usb_gadget_unmap_request(&mtu->g, req, mep->is_in); goto error; }